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so what kind of operating range would you say cap tube systems have. I have seen txv's operate over a several ton range.

could you say, take the cap tubes from a 3 ton evap and use them on anything from say 2 ton to 4 ton just as an example. if not why, I would consider an oprating range the defining charictaristic of a modulating metering device. Prove that then you may have a chance of actually winning this.

i agree with you except for the modulating part. it is a action reaction device with known outcomes under known conditions and they do not change. that is the nature of fixed metering devices. a modulating device can change those outcomes or maintain them under other conditions

I then will assume that a TXV's reaction to an action is unknown and therefore it must truly be an uncontrollable but none the less modulating metering device, but wait a minute wait a minute here I think I remember reading somewhere that it was very well known how it would react to temperature change at the bulb wow wow wow this is great we are truly getting somewhere now if we are not very very careful we might discover something new to the field here tonight, since the reaction to an action is predictable the TXV must certainly be a fixed metering device, Nah, I'm going to go with modulating.

Give it up yur outmanned and I got to get some sleep.

Oh yeah I read that in the instructions.I remember it now, the little blue and white piece of paper with the label "read this first" on it.